Robertson underwent foot surgery to remove a cyst this offseason and will miss preseason games, Lia Assimakopoulos of The Dallas Morning News reports.
Robertson posted an assist, two shots on goal and two blocked shots in Thursday's 3-2 double-overtime loss to the Oilers in Game 1.
Robertson notched two assists, four shots on goal, four hits and four blocked shots in Monday's 5-1 win over the Avalanche in Game 4.
Robertson scored the game-winning goal on the power play in Wednesday's 3-2 victory over the Golden Knights in Game 5.
Robertson scored the game-winning goal on the power play and added an even-strength assist in Saturday's 3-1 win over the Kraken.
Robertson notched two assists, including one on the power play, in Friday's 4-2 win over the Penguins.
Robertson recorded a power-play assist and three shots on goal in Saturday's 4-1 win over the Kings.
Robertson picked up a goal and an assist in Tuesday's 4-3 loss versus Florida.
Robertson notched a power-play assist, four shots on goal and a minus-2 rating in Tuesday's 7-6 overtime win over the Sharks.
Robertson scored his 20th goal of the season in Thursday's 4-1 win over the Jets.